Catching 302 - temporarily moved code.

Question

Hi,
I am trying to connect to a webserver and authenticate from a java program. Once authenticated, the server seems to send a cookie with the id and a "302 - temporarily moved" status.
I want to catch this part and save the cookie so i can issue more requests to the server. But when i use a URLConnection and read the stream data, I seem to get the final redirected page where the cookie is lost. Could someone please point me to what is wrong in the code below
public void login(String url,String userid,String pw)
//           Construct data
        String data = URLEncoder.encode("j_username", "UTF-8") + "=" + URLEncoder.encode(userid, "UTF-8");
        data += "&" + URLEncoder.encode("j_password", "UTF-8") + "=" + URLEncoder.encode(pw, "UTF-8");
        // Send data
        URL url = new URL(url);
        URLConnection conn = url.openConnection();
        conn.setDoOutput(true);
        OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
        wr.write(data);
        wr.flush();       
       System.out.println(conn.getHeaderField("Set-Cookie"));   
        // Get the response
        BufferedReader bf = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String line;
        while ((line = bf.readLine()) != null) {
            System.out.println(line);
        wr.close();
        bf.close();
}Edited by: suppandi on Oct 31, 2007 3:45 PM
Edited by: suppandi on Oct 31, 2007 3:46 PM

Answer 1

Do you know about Java API documentation? Very useful...
Look into and read about HttpURLConnection.setInstanceFollowRedirects() method.
http://java.sun.com/javase/6/docs/api/